1. Beck, H. and König, G. (1967) Restraining forces in the analysis of tall buildings. Proceedings of a Symposium on Tall Buildings, Pergamon Press, Oxford, 513-536
2. Beck, H. and Zilch, K. (1972) Stability (in the design of tall concrete buildings). Theme report. International Conference on Planning and Design of Tall Buildings, Vol.III, Lehigh University, Pennsylvania, 499-516